What happened
The pilot initiated a maneuver to conduct a practice autorotation, targeting a pasture for the landing phase. The operation began from an altitude of approximately 1,000 feet above ground level. Environmental conditions during the attempt were characterized by gusty winds, which likely contributed to the difficulty in maintaining stable flight parameters.
During the execution of the maneuver, the helicopter developed an excessive sink rate. Recognizing the situation, the pilot attempted to abort the autorotation and execute a go-around. Power was applied in an effort to arrest the descent; however, the aircraft was unable to stop the downward momentum before impacting the ground. The result was a hard touchdown.
The investigation
The factual narrative provided indicates that the primary mechanical or operational failure was the inability to arrest the sink rate despite power application. No specific mechanical defects were cited in the source text, pointing instead to the aerodynamic challenges presented by the maneuver and weather conditions.